Winner of the Masters 1000 Paris-Bercy a week earlier, Novak Djokovic has only 63 'to pick his 54th win of the year. Matteo Berrettini resisted until 2-2 in the initial set. But the Italian, who quickly "overplayed", then conceded eight games in a row to end up led 6-2 4-0.
This is the 11th consecutive time that Novak Djokovic has managed to win his first match in the big rendezvous at the end of the season. He also failed only once in the opening round Robin, during his first participation in 2007. He had lost his three group games.
Since then, Novak Djokovic has perfectly rectified shooting in these "ATP Finals". First crowned in 2008 in Shanghai, he reached the final in his last six appearances at the O2 Arena, winning four straight titles (2012-2015) before losing in the finals in 2016 and 2018. The Serb is aiming for a sixth title of Master, which would allow him to match a Roger Federer.